class Phone:
    IMEI = None
    producer = "小米"

    def call_by_5g(self):
        print("5g启动,开启5g通话")


class NFCReader():
    nfc_type = "新一代"

    def useNfc(self):
        print("开始使用NFC")

    def closeNfc(self):
        print("关闭使用NFC")


class RemoteControl:
    rc_type = "红外线"

    def userRc(self):
        print("开始使用红外线")


class Xiaomiphone(Phone, NFCReader, RemoteControl):
    pass


ph = Xiaomiphone()
ph.call_by_5g()
ph.useNfc()
ph.closeNfc()
ph.userRc()